Summer Has Long Stressed Electric Grids. Now Winter Does, Too.

Electric utilities, which designed their system to meet peak demand in sizzling weather, are straining to keep up during the cold.

What Ails Offshore Wind: Supply Chains, Ships and Interest Rates

Government officials and energy developers misjudged the difficulty of building huge clean energy projects in the United States, which has built very few of them.

China Is Winning in Solar Power, but Its Coal Use Is Raising Alarms

China is building as much clean energy capacity over four years as it had promised to build in 10 years, but continues to add coal-fired power plants.